US7031552B2 - Adaptive post-filtering for reducing noise in highly compressed image/video coding - Google Patents

Adaptive post-filtering for reducing noise in highly compressed image/video coding Download PDF

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US7031552B2
US7031552B2 US10/244,071 US24407102A US7031552B2 US 7031552 B2 US7031552 B2 US 7031552B2 US 24407102 A US24407102 A US 24407102A US 7031552 B2 US7031552 B2 US 7031552B2
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pixel
difference
predefined threshold
filtering
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US20030190086A1 (en
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Changick Kim
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Godo Kaisha IP Bridge 1
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Seiko Epson Corp
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Assigned to SEIKO EPSON CORPORATION reassignment SEIKO EPSON CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EPSON RESEARCH AND DEVELOPMENT, INC.
Priority to EP03007787A priority patent/EP1351508A3/en
Priority to JP2003102338A priority patent/JP2003339048A/ja
Priority to CNB031103138A priority patent/CN1239027C/zh
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00—Image enhancement or restoration
    • G06T5/20—Image enhancement or restoration by the use of local operators
    • G06T5/70—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/117—Filters, e.g. for pre-processing or post-processing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/136—Incoming video signal characteristics or properties
    • H04N19/14—Coding unit complexity, e.g. amount of activity or edge presence estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
    • H04N19/182—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a pixel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • H04N19/61—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding in combination with predictive coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/80—Details of filtering operations specially adapted for video compression, e.g. for pixel interpolation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • H04N19/86—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving reduction of coding artifacts, e.g. of blockiness
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20021—Dividing image into blocks, subimages or windows
US10/244,071 2002-04-05 2002-09-13 Adaptive post-filtering for reducing noise in highly compressed image/video coding Active 2024-09-07 US7031552B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US10/244,071 US7031552B2 (en) 2002-04-05 2002-09-13 Adaptive post-filtering for reducing noise in highly compressed image/video coding
EP03007787A EP1351508A3 (en) 2002-04-05 2003-04-04 Adaptive post-filtering for reducing noise in highly compressed image/video coding
CNB031103138A CN1239027C (zh) 2002-04-05 2003-04-04 对解码的高度压缩图像/视频内容进行滤波的方法和装置
JP2003102338A JP2003339048A (ja) 2002-04-05 2003-04-04 高圧縮型イメージ／ビデオコーディングからノイズを減らすための適応型ポストフィルタリング

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US37064302P 2002-04-05 2002-04-05
US10/244,071 US7031552B2 (en) 2002-04-05 2002-09-13 Adaptive post-filtering for reducing noise in highly compressed image/video coding

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US7031552B2 true US7031552B2 (en) 2006-04-18

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EP (1) EP1351508A3 (ja)
JP (1) JP2003339048A (ja)
CN (1) CN1239027C (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050078872A1 (en) * 2003-10-10 2005-04-14 Ramin Samadani Reducing artifacts in compressed images
US20050271287A1 (en) * 2002-07-31 2005-12-08 Koninklijke Philips Lectronics, N.V. Dynamic detection of blocking artefacts
US20060146139A1 (en) * 2005-01-04 2006-07-06 Etron Technology, Inc. Digitized image stabilization using energy analysis method
US20070071356A1 (en) * 2005-09-29 2007-03-29 Caviedes Jorge E Method and apparatus for blocking artifact detection and measurement in block-coded video
US20080118177A1 (en) * 2006-11-16 2008-05-22 Munenori Oizumi Post-Processing Technique for Noise Reduction of DCT-Based Compressed Images
US20080123754A1 (en) * 2004-05-03 2008-05-29 Ratakonda Krishna C Method of filtering pixels in a video encoding process
US20100002951A1 (en) * 2008-07-01 2010-01-07 Texas Instruments Incorporated Method and apparatus for reducing ringing artifacts
US20100111424A1 (en) * 2008-11-04 2010-05-06 Canon Kabushiki Kaisha Image processing apparatus, filter device, methods of controlling same and computer programs therefor
US9361860B2 (en) 2012-08-02 2016-06-07 Samsung Electronics Co., Ltd. Display apparatus, image post-processing apparatus and method for image post-processing of contents
US20220067885A1 (en) * 2020-08-28 2022-03-03 Apple Inc. Scaler de-ringing in image processing circuitry

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100243225B1 (ko) 1997-07-16 2000-02-01 윤종용 블록화효과 및 링잉잡음 감소를 위한 신호적응필터링방법 및신호적응필터
US7471845B2 (en) 2004-01-06 2008-12-30 Sharp Laboratories Of America, Inc. De-ringing filter
US7551793B2 (en) * 2004-01-14 2009-06-23 Samsung Electronics Co., Ltd. Methods and apparatuses for adaptive loop filtering for reducing blocking artifacts
JP4724124B2 (ja) * 2004-10-08 2011-07-13 パナソニック株式会社 画像処理装置および画像処理プログラム
US7136536B2 (en) * 2004-12-22 2006-11-14 Telefonaktiebolaget L M Ericsson (Publ) Adaptive filter
JP2006279709A (ja) * 2005-03-30 2006-10-12 Toshiba Corp 情報処理装置および画像処理方法
US20090123079A1 (en) * 2005-12-21 2009-05-14 Koninklijke Philips Electronics, N.V. Reduction of compression artefacts in displayed images
KR101216730B1 (ko) * 2006-04-11 2012-12-28 톰슨 라이센싱 내용-적응형 필터 기술
US9014280B2 (en) * 2006-10-13 2015-04-21 Qualcomm Incorporated Video coding with adaptive filtering for motion compensated prediction
JP2008109247A (ja) * 2006-10-24 2008-05-08 Matsushita Electric Ind Co Ltd ビデオ・ノイズをフィルタリングする方法、装置、集積回路およびエンコーダ
DE102007037857A1 (de) * 2007-08-10 2009-02-12 Micronas Gmbh Verfahren zur Reduktion von Bildartefakten
US10123050B2 (en) 2008-07-11 2018-11-06 Qualcomm Incorporated Filtering video data using a plurality of filters
TWI415470B (zh) * 2008-10-09 2013-11-11 Mstar Semiconductor Inc 去漣波裝置及方法
CN102236885A (zh) * 2010-04-21 2011-11-09 联咏科技股份有限公司 减少图像噪声的过滤器与过滤方法
US9510018B2 (en) 2011-11-23 2016-11-29 Luca Rossato Signal analysis and generation of transient information
US9104941B1 (en) * 2011-12-02 2015-08-11 Marvell International Ltd. Method and apparatus for reducing noise in a scanned image while minimizing loss of detail in the scanned image
WO2014021566A1 (en) * 2012-08-02 2014-02-06 Samsung Electronics Co., Ltd. Display apparatus, image post-processing apparatus and method for image post-processing of contents
US20140327737A1 (en) * 2013-05-01 2014-11-06 Raymond John Westwater Method and Apparatus to Perform Optimal Visually-Weighed Quantization of Time-Varying Visual Sequences in Transform Space
CN105120132B (zh) * 2015-08-26 2019-03-26 美国掌赢信息科技有限公司 一种视频噪点过滤方法和电子设备

Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454051A (en) 1991-08-05 1995-09-26 Eastman Kodak Company Method of reducing block artifacts created by block transform compression algorithms
US5818964A (en) * 1994-12-27 1998-10-06 Texas Instruments Incorporated Method and apparatus for selecting an adaptive filter for image data
US5819035A (en) * 1995-10-20 1998-10-06 Matsushita Electric Industrial Co., Ltd. Post-filter for removing ringing artifacts of DCT coding
US5883983A (en) 1996-03-23 1999-03-16 Samsung Electronics Co., Ltd. Adaptive postprocessing system for reducing blocking effects and ringing noise in decompressed image signals
US5937101A (en) 1995-01-20 1999-08-10 Samsung Electronics Co., Ltd. Post-processing device for eliminating blocking artifact and method therefor
US5969604A (en) * 1997-04-29 1999-10-19 Pittway Corporation System and method of adjusting smoothing
US5974197A (en) 1997-01-29 1999-10-26 Samsung Electronics Co., Ltd. Loop filter and loop filtering method
US6028967A (en) 1997-07-30 2000-02-22 Lg Electronics Inc. Method of reducing a blocking artifact when coding moving picture
WO2000033254A1 (en) 1998-12-03 2000-06-08 Koninklijke Philips Electronics N.V. Post-processing decompressed images
US6115503A (en) 1996-07-04 2000-09-05 Siemens Aktiengesellschaft Method and apparatus for reducing coding artifacts of block-based image encoding and object-based image encoding
US6151420A (en) 1995-12-15 2000-11-21 Polaroid Corporation Minimizing blocking artifacts in a filtered image
US6167164A (en) 1997-03-10 2000-12-26 Samsung Electronics Co., Ltd. One-dimensional signal adaptive filter for reducing blocking effect and filtering method
US6188799B1 (en) 1997-02-07 2001-02-13 Matsushita Electric Industrial Co., Ltd. Method and apparatus for removing noise in still and moving pictures
US6226050B1 (en) 1997-04-04 2001-05-01 Samsung Electronics Co., Ltd. Signal adaptive filtering method for reducing ringing noise and signal adaptive filter
US6229929B1 (en) 1998-05-14 2001-05-08 Interval Research Corporation Border filtering of video signal blocks
US6240135B1 (en) * 1997-09-09 2001-05-29 Lg Electronics Inc Method of removing blocking artifacts in a coding system of a moving picture
US20010003545A1 (en) 1999-12-08 2001-06-14 Lg Electronics Inc. Method for eliminating blocking effect in compressed video signal
US6259823B1 (en) 1997-02-15 2001-07-10 Samsung Electronics Co., Ltd. Signal adaptive filtering method and signal adaptive filter for reducing blocking effect and ringing noise
US6285801B1 (en) * 1998-05-29 2001-09-04 Stmicroelectronics, Inc. Non-linear adaptive image filter for filtering noise such as blocking artifacts
US20010019634A1 (en) 2000-01-21 2001-09-06 Nokia Mobile Phones Ltd. Method for filtering digital images, and a filtering device
US6304678B1 (en) * 1999-05-14 2001-10-16 The Trustees Of Boston University Image artifact reduction using maximum likelihood parameter estimation
US6320987B1 (en) 1998-10-16 2001-11-20 Neo Paradigm Labs, Inc. Pre-DCT residue filter
US6463182B1 (en) * 1995-12-28 2002-10-08 Canon Kabushiki Kaisha Image processing apparatus and method for removing noise near an edge of an image
US6633638B1 (en) * 1999-12-02 2003-10-14 At&T Corp. Method and apparatus for a customer self-provisioning of outpulsed digits in a telecommunication network
US6721458B1 (en) * 2000-04-14 2004-04-13 Seiko Epson Corporation Artifact reduction using adaptive nonlinear filters
US6748113B1 (en) * 1999-08-25 2004-06-08 Matsushita Electric Insdustrial Co., Ltd. Noise detecting method, noise detector and image decoding apparatus

Patent Citations (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454051A (en) 1991-08-05 1995-09-26 Eastman Kodak Company Method of reducing block artifacts created by block transform compression algorithms
US5818964A (en) * 1994-12-27 1998-10-06 Texas Instruments Incorporated Method and apparatus for selecting an adaptive filter for image data
US5937101A (en) 1995-01-20 1999-08-10 Samsung Electronics Co., Ltd. Post-processing device for eliminating blocking artifact and method therefor
US5819035A (en) * 1995-10-20 1998-10-06 Matsushita Electric Industrial Co., Ltd. Post-filter for removing ringing artifacts of DCT coding
US6151420A (en) 1995-12-15 2000-11-21 Polaroid Corporation Minimizing blocking artifacts in a filtered image
US6463182B1 (en) * 1995-12-28 2002-10-08 Canon Kabushiki Kaisha Image processing apparatus and method for removing noise near an edge of an image
US5883983A (en) 1996-03-23 1999-03-16 Samsung Electronics Co., Ltd. Adaptive postprocessing system for reducing blocking effects and ringing noise in decompressed image signals
US6115503A (en) 1996-07-04 2000-09-05 Siemens Aktiengesellschaft Method and apparatus for reducing coding artifacts of block-based image encoding and object-based image encoding
US5974197A (en) 1997-01-29 1999-10-26 Samsung Electronics Co., Ltd. Loop filter and loop filtering method
US6188799B1 (en) 1997-02-07 2001-02-13 Matsushita Electric Industrial Co., Ltd. Method and apparatus for removing noise in still and moving pictures
US6259823B1 (en) 1997-02-15 2001-07-10 Samsung Electronics Co., Ltd. Signal adaptive filtering method and signal adaptive filter for reducing blocking effect and ringing noise
US6167164A (en) 1997-03-10 2000-12-26 Samsung Electronics Co., Ltd. One-dimensional signal adaptive filter for reducing blocking effect and filtering method
US6226050B1 (en) 1997-04-04 2001-05-01 Samsung Electronics Co., Ltd. Signal adaptive filtering method for reducing ringing noise and signal adaptive filter
US5969604A (en) * 1997-04-29 1999-10-19 Pittway Corporation System and method of adjusting smoothing
US6028967A (en) 1997-07-30 2000-02-22 Lg Electronics Inc. Method of reducing a blocking artifact when coding moving picture
US6240135B1 (en) * 1997-09-09 2001-05-29 Lg Electronics Inc Method of removing blocking artifacts in a coding system of a moving picture
US6229929B1 (en) 1998-05-14 2001-05-08 Interval Research Corporation Border filtering of video signal blocks
US6285801B1 (en) * 1998-05-29 2001-09-04 Stmicroelectronics, Inc. Non-linear adaptive image filter for filtering noise such as blocking artifacts
US6320987B1 (en) 1998-10-16 2001-11-20 Neo Paradigm Labs, Inc. Pre-DCT residue filter
WO2000033254A1 (en) 1998-12-03 2000-06-08 Koninklijke Philips Electronics N.V. Post-processing decompressed images
US6317522B1 (en) 1998-12-03 2001-11-13 Philips Electronics North America Corp. Systems and methods for post-processing decompressed images
US6304678B1 (en) * 1999-05-14 2001-10-16 The Trustees Of Boston University Image artifact reduction using maximum likelihood parameter estimation
US6748113B1 (en) * 1999-08-25 2004-06-08 Matsushita Electric Insdustrial Co., Ltd. Noise detecting method, noise detector and image decoding apparatus
US6633638B1 (en) * 1999-12-02 2003-10-14 At&T Corp. Method and apparatus for a customer self-provisioning of outpulsed digits in a telecommunication network
US20010003545A1 (en) 1999-12-08 2001-06-14 Lg Electronics Inc. Method for eliminating blocking effect in compressed video signal
US20010019634A1 (en) 2000-01-21 2001-09-06 Nokia Mobile Phones Ltd. Method for filtering digital images, and a filtering device
US6721458B1 (en) * 2000-04-14 2004-04-13 Seiko Epson Corporation Artifact reduction using adaptive nonlinear filters

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050271287A1 (en) * 2002-07-31 2005-12-08 Koninklijke Philips Lectronics, N.V. Dynamic detection of blocking artefacts
US7805018B2 (en) * 2002-07-31 2010-09-28 Koninklijke Philips Electronics N.V. Dynamic detection of blocking artifacts
US7643688B2 (en) * 2003-10-10 2010-01-05 Hewlett-Packard Development Company, L.P. Reducing artifacts in compressed images
US20050078872A1 (en) * 2003-10-10 2005-04-14 Ramin Samadani Reducing artifacts in compressed images
US20080123754A1 (en) * 2004-05-03 2008-05-29 Ratakonda Krishna C Method of filtering pixels in a video encoding process
US8055091B2 (en) * 2004-05-03 2011-11-08 International Business Machines Corporation Method of filtering pixels in a video encoding process
US7961966B2 (en) * 2005-01-04 2011-06-14 Etron Technology, Inc. Digitized image stabilization using energy analysis method
US20060146139A1 (en) * 2005-01-04 2006-07-06 Etron Technology, Inc. Digitized image stabilization using energy analysis method
US20070071356A1 (en) * 2005-09-29 2007-03-29 Caviedes Jorge E Method and apparatus for blocking artifact detection and measurement in block-coded video
US7606423B2 (en) * 2005-09-29 2009-10-20 Intel Corporation Method and apparatus for blocking artifact detection and measurement in block-coded video
US20080118177A1 (en) * 2006-11-16 2008-05-22 Munenori Oizumi Post-Processing Technique for Noise Reduction of DCT-Based Compressed Images
US7796834B2 (en) * 2006-11-16 2010-09-14 Texas Instruments Incorporated Post-processing technique for noise reduction of DCT-based compressed images
US20100002951A1 (en) * 2008-07-01 2010-01-07 Texas Instruments Incorporated Method and apparatus for reducing ringing artifacts
US7894685B2 (en) 2008-07-01 2011-02-22 Texas Instruments Incorporated Method and apparatus for reducing ringing artifacts
US20100111424A1 (en) * 2008-11-04 2010-05-06 Canon Kabushiki Kaisha Image processing apparatus, filter device, methods of controlling same and computer programs therefor
US8554006B2 (en) * 2008-11-04 2013-10-08 Canon Kabushiki Kaisha Image processing apparatus, filter device, methods of controlling same and computer programs therefor
US9361860B2 (en) 2012-08-02 2016-06-07 Samsung Electronics Co., Ltd. Display apparatus, image post-processing apparatus and method for image post-processing of contents
US20220067885A1 (en) * 2020-08-28 2022-03-03 Apple Inc. Scaler de-ringing in image processing circuitry
US11941783B2 (en) * 2020-08-28 2024-03-26 Apple Inc. Scaler de-ringing in image processing circuitry

Also Published As

Publication number Publication date
CN1450811A (zh) 2003-10-22
JP2003339048A (ja) 2003-11-28
EP1351508A3 (en) 2007-08-22
US20030190086A1 (en) 2003-10-09
CN1239027C (zh) 2006-01-25
EP1351508A2 (en) 2003-10-08

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